Ordering number : EN2291B Monolithic Linear IC LA1266 AM/FM Tuner System Of Electronic Tuning Type Functions Package Dimensions FM : IF amplifier, quadrature detector, AF preamplifier, signal meter, IF count outputlifier, tuning indicator drive output (common with stop signal, muting drive output) AM : RF amplifier, MIX, OSC (with ALC), IF amplifier, detector, AGC, signal meter, tuning indicator drive output (common with stop signal), IF count output, local OSC buffer. unit : mm 3067-DIP24S [LA1266] Features • Minimum number of external parts required. • Excellent S/N • Local OSC with ALC • Local OSC buffer • Tuning indicator pin (common with narrow-band stop signal and muting drive output) • Variable stop sensitivity (variable separately for FM, AM) • Less tweet interference • Signal meter pin • IF count output SANYO : DIP24S Specifications Maximum Ratings at Ta=25°C Parameter Maximum supply voltage Symbol Conditions Ratings Unit VCC max Pins 7,8,20 16 V Flow-in current I8 Pin 8 20 mA Flow-out current I22 Pin 22 1 mA I24 Pin 24 Pd max Ta≤60°C Allowable power dissipation 2 mA 700 mW Operating temperature Topr –20 to +70 °C Storage temperature Tstg –40 to +125 °C Operating Conditions at Ta=25°C Parameter Symbol Recommended supply voltage VCC Operating voltage range VCC op Conditions Ratings Unit 8.5 V 6 to 14 V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN N3097HA (KT)/41594HK/9047AT/7256KI, TS No.2291-1/11 LA1266 Operating Characteristics at Ta=25°C, VCC=8.5V, See Test Circuit. Parameter Symbol Conditions Ratings min Unit typ max 22 30 mA [AM : fc=1MHz, fm=1kHz] Quiescent current Icco No input Detection output VO1 VIN=20dBµ, 30% mod. 30 60 110 mV VO2 VIN=80dBµ, 30% mod. 90 150 210 mV S/N1 VIN=20dBµ 15 19 dB S/N2 VIN=80dBµ 49 54 dB THD1 VIN=80dBµ, 30% mod. 0.3 1.0 % THD2 VIN=107dBµ, 30% mod. 0.3 1.0 % VSM1 No input VSM2 VIN=80dBµ LED drive sensitivity LED-ON ILED=1mA 13 Local OSC buffer output VOSC fosc=1.45MHz 220 IF buffer output VIF VIN=20dBµ 120 Quiescent current Icco Input limiting sensitivity –3dBL.S. Demodulation output VO VIN=100dBµ, 100% mod. S/N ratio S/N VIN=100dBµ Total harmonic distortion THD VIN=100dBµ, 100% mod. Signal meter output VSM1 No input VSM2 LED drive sensitivity LED-ON Signal to noise ratio Total harmonic distortion Signal meter output 0 0 0.2 V 1.8 2.8 3.5 V 23 33 dBm 280 340 mV 180 250 mV No input 29 40 mA 3dB down, 100% mod. 31 37 dBµ 270 390 540 mV 78 84 [FM : fc=10.7MHz, fm=1kHz] dB 0.03 0.3 % 0 0 0.2 V VIN=100dBµ 1.7 2.3 3.1 V ILED=1mA 46 61 76 dBµ 140 kHz LED drive bandwidth LED-BW VIN=100dBµ, ILED=1mA 70 105 AM rejection ratio AMR VIN=100dBµ, 100% mod. 45 58 IF buffer output VIF 110 160 dB AM-1kHz, 30% mod. VIN=50dBµ 230 mV Equivalent Circuit Block Diagram No.2291-2/11 LA1266 How to use LA1266 1. LED driver, muting drive output, stop signal(SD). • For LED drive, muting drive output, stop signal, the output at pin 8 is used. • Voltage on pin 8, when tuned, turns from "H" to "L" . (Active-low) • Signal bandwidth at pin 8 – For AM, the bandwidth depends on the C.F(BFU450CN) at pin 14. If a capacitor is connected in place of the C.F, the bandwidth will get wider. – For FM, the bandwidth depends on the resistance across pins 9 and 22. If the resistance is increased, the bandwidth will get narrower. R=15kΩ makes the bandwidth approximately 110kHz. – Resistance across Pins 9 and 22 LED drive bandwidth – kHz LED Drive Bandwidth Resisitance across Pins 9 and 22 – kΩ • Sensitivity adjustment of LED, muting, stop signal – For FM, the semifixed variable resistor across pin 16 and GND is used. – For AM, the semifixed variable resistor across pin 17 and GND is used. The relation (for AM,FM) between signal meter voltage and input voltage with the resistance of the semifixed variable resistor as a parameter is shown below. AM S Meter Voltage S meter voltage – V S meter voltage – V FM S Meter Voltage IF input voltage – dBµ Antenna input voltage – dB/m Unit (capacitance : F) No.2291-3/11 LA1266 2. AM/FM changeover • AM/FM changeover is made using pin 20 as shown right. • However, the voltage on pin 20 relative to VCC (pin 7) must be within the range of +0.1V to – 0.8V. If not within this range, distortion and selectivity will get worse. A resistance of 68kΩ at the IFT cold terminal, which is used to prevent the changeover circuit from malfunctioning, must be connected. 68kΩ V9 – mVrms 3. Local OSC buffer output • When local OSC buffer output waveform is saw-toothed at the SW mode, connect a reistance of 1.2kΩ or thereabouts across pin 24 and GND. 4. Capacitance across pin 9 and GND A large capacitance across pin 9 and GND may cause a V9 – Modulation Frequency misstop at an adjacent channel when the channel select speed is made faster at the autmatic channel select mode. In thes case, decrease the capacitance across pin 9 and GND. However, if too decreased, the LED will flutter at low modulation frequencies at the time of detuning. Therefore, it is recommended to fix the capacitance across pin 9 and GND to be 3.3µF to 10µF. The relation between modulation frequency and demodulation output voltage on pin 9 with the capacitance across pin 9 and GND as a parameter is shown right. Ω Modulatin frequency – Hz 5. If the coupling coefficient of the local OSC coil is small and an antiresonance point of approximately 100MHz is present or the stray capacitance across pin 24 and pin 23 is large, a parasitic oscillation of approximately 100MHz may occur in the buffer output (pin 24). In this case, connect a capacitance of approximately 30pF across pin 24 and GND. 6. AM OSC coil Generally speaking, the following should be noted. Avoid winding with loose coupling between primary side and secondary side (especially SW1, SW2). To be concrete, the pot core type is better than the screw type which is loose in coupling. This prevents the local OSC frequency from turning third resonance frequency related to the coupling coefficient. 7. Resistance across pin 8 and VDD If pin 8 is used for stop signal (SD) only, without using LED, it is recommended to fix resistance RL across pin 8 and VDD to be 51kΩ to 100kΩ. 8. To prevent whistle from worsening, make the pattern of AM output pin 15 as short as possible. 9. AM, FM IF buffer output Application of a voltage to pin 13 (STRQ) causes AM IF(455kHz) signal (at AM mode) and FM IF(10.7MHz) signal (at FM mode) to be delivered at pin 11 and pin 10, respectively. It is recommended that the voltage to be applied to No.2291-4/11 LA1266 Test Circuit : FM, AM-MW Unit (resistance : Ω, capacitance : F) FM Current Drain Characteristic Current drain, ICC – mA Current drain, ICC – mA AM Current Drain Characteristic ICC (Inciuding no LED current) Antenna input voltage – dB/m Input voltage, VIN – dBµ AM Input/Ontput Characteristic THD – VIN(ANT) Detection z-30% output 1kH Noise voltage Antenna input voltage – dB/m Total harmonic distortion, THD – % Noise voltage, Detection output – dBm (Inciuding no LED current) Antenna input voltage, VIN(ANT) – dB/m No.2291-5/11 LA1266 AM S Meter Current Characteristic AM S Meter Voltage Characteristic Non-modulation See Test Circuit. S meter voltage,Vsm – V S meter current, ISM – mA Non-modulation See Test Circuit. Antenna input voltage – dB/m Fidelity Characteristic Selectivity Characteristic Attenuation – dB n Frequency, ∆f – kHz Modulation frequency – Hz AM VCC Characteristic g sensitivity LED lightin Detection output – dBm S/N – dB Output 30mV sensitivity S meter voltage Input=0 Supply voltage,VCC – V IF buffer output – mV Input=45dB/m tput Detection ouµ, 1kHz-30% mod Input=80dB S/N Input=80dBµ THD input=80dBµ, 1kHz-30% mod Input=100dB/m S meter voltage, VSM – V Detection output – dBm Sensitivity – dB/m If buffer output (Input=45dB/m) Current drain, ICC – mA Detection output (Input=100dB/m) IF buffer output – mV al n, ICC no sign Current drai AM Temperature Characteristic (1) IF output Input=80dBµ Input=20dBµ Total harmonic distortion, THD – % tio ua Distorrion f=1MHz 1kHz-30% mod Output 50mV constant Attenuation – dB ten At f=1MHz 100dB/m Input constant 30% mod Total harmonic distortion, THD – % Antenna input voltage – dB/m IF output Input=80dBµ Input=20dBµ Ambient temperature, Ta – °C No.2291-6/11 LA1266 FM Input/Output Characteristic VSN input=80dBµ Detection output 1kHz-75kHz dev Noise voltage, AM output, Detection output – dBm S meter voltage, VSM – V AM Temperature Characteristic(2) VSN input=25dBµ VSN no input AM output 1kHz-30% mod Noise Voltage LED-on Voltage – V IF input voltage – dBµ Distortion Characteristic f=10.7MHz Total harmonic distortion, THD – % S/N=20dB sensitivi ty, 1kHz-30% mod LED-lighting sensitivity Output 20mV sensitivity,1kHz-30% mod THD 1kHz-75kHz dev IF input voltage – dBµ Ambient temperature, Ta – °C Detection output (Input=100dBµ) al n, ICC no sign S meter current, ISM – µA Current drai FM S Meter Voltage Characteristic S meter voltage, VSM – V Non-modulation See Test Circuit. Detection output – dBm IF input voltage – dBµ Sensitivity – dBµ -3dB limiting sensitivity 50dBµ ) IF buffer output (Input= LED lighting sensitivity Input=100dBµ S meter voltage Input=100dBµ 0dBµ IF input voltage – dbµ IF buffer output – mV Non-modulation See Test Circuit. Current drain, ICC – mA FM VCC Characteristic FM S Meter Characteristic S meter voltage, VSM – V Sensitivity – dBµ LED-on voltge Supply voltage, VCC – V No.2291-7/11 LA1266 IF buffer output – mV Detection output mod Input=100dBµ , 1kHz-100% µ 0dB r uffe S/N Input=100dBµ Sensitivity – dBµ IF b Inpu ut outp LED-on voltage – V t=10 THE Input=100dBµ , 1kHz-100% mod LED-on voltage LED lighting sensitivity VSM Input=100dBµ sitivity, iting sen 1kHz-100% mod LEDBW, I nput= 100dB µ -3dB lim VSM Input=50dBµ VSM no input Ambient temperature, Ta – °C Bandwidth – kHz S meter voltage, VSM – V FM Temperature Characteristic(1) Total harmonic distortion, THD – % S/N – dB Detection output – dBm FM Temperature Characteristic(1) Ambient temperature, Ta – °C Sensitivity – dB/m Interference – dB AM Receiving Characteristic IF interference Ima ge i nter fere Usable sensitivity (1kHz - 30%mod, Maximum sensistivit y (1kHz - 3 0% mod, detection o nce S/N=20dB) utput 40m V) Tracking adjust at each frequency. Receiving frequency, fr – kHz No.2291-8/11 LA1266 Coil Specifications MW antenna Bar antenna (for PVC22KTL) •TN-10896 (Mitsumi) Tight solenoid direct winding space winding tight solenoid winding Loop antenna (for SVC321) • LA300 (Korin Giken) Loop antenna. matching coil • KL-412 AM IFT coil Matching coil for SFZ450B (2-element type) YT-30150 (Mitsumi) • KO-387 (Korin Giken) For SVC321 FM double tuning detection coil HW-6146 (Mitsumi) HW-40131 Unit (resistance : Ω) (Mitsumi) (Mitsumi) Internal 180pF Internal 100pF±10% Internal 100pF±10% No.2291-9/11 LA1266 Unit (resistance : Ω, capacitance : F) Sample Application Circuit : LA1177, LA1266, LM7000 No.2291-10/11 LA1266 LA1177+LA1266 Overall Characteristic LA1177+LA1266 Overall Characteristic Noise voltage Input – dBµ S meter voltage – V Noise voltage, AM output, Detection output – dBm AM output (1kHz-30%mod) Total harmonic distortion, THD – % S meter (non-modulation,VR=15kΩ) Detection output (75kHz dev.) THD (1kHz-75kHz dev.) Input – dBµ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibilty for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of November, 1997. Specifications and information herein are subject to change without notice. No.2291-11/11